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by Ciro Santilli (@cirosantilli, 37)

Alpha particles have low penetration depth

 ... Nuclear physics Nuclear reaction Radioactive decay Type of radioactive decay Alpha decay Alpha particle
 0 By others on same topic  0 Discussions  Updated 2025-06-17  +Created 2024-08-14  See my version
They are stopped by:
  • by a few centimeters of air
  • a sheet of paper
  • the skin
Therefore, alpha emitters are not too dangerous unless ingested.

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  1. Alpha particle
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